Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
Molecular architecture: Another plausible pathway toward a low band gap polymer
Date
2010-05-01
Author
Tarkuc, Simge
Udum, Yasemin Arslan
Toppare, Levent Kamil
Metadata
Show full item record
This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
.
Item Usage Stats
200
views
0
downloads
Cite This
A donor-acceptor-donor pi-conjugated monomer (10,13-bis(2,3-dihydrothieno[3,4-b][1,4]dioxin-5-yl)dibenzo[a,c]phenazine (PHED)) composed of bi-EDOT and dibenzo[a,c]phenazine repeat units was synthesized to examine the role of acceptor structure on the electronic and optoelectronic properties of the polymer. The spectroelectrochemical analysis showed that the introduction of electron-accepting unit results in a shift in the onset of the pi-pi* transition towards longer wavelengths. The optical band gap (Eg) for PPHED was found to be 1.10 eV and lambda(max) was 790 nm. Switching ability of PPHED was evaluated by kinetic studies via measuring the percent transmittance as 80% at 1600 nm. The high optical contrast within the NIR region makes this material a good candidate for NIR device applications. Dual-type complementary colored electrochromic devices (ECD) using PPHED/PEDOT in sandwich configuration were constructed. Spectroelectrochemistry, switching ability and open circuit memory of the ECDs were investigated.
Subject Keywords
Analytical Chemistry
,
Electrochemistry
,
General Chemical Engineering
URI
https://hdl.handle.net/11511/41588
Journal
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
DOI
https://doi.org/10.1016/j.jelechem.2010.03.003
Collections
Department of Chemistry, Article
Suggestions
OpenMETU
Core
Electrochemical and optical properties of novel terthienyl based azobenzene, coumarine and fluorescein containing polymers: Multicolored electrochromic polymers
Yigit, Deniz; Udum, Yasemin Arslan; GÜLLÜ, Mustafa; Toppare, Levent Kamil (Elsevier BV, 2014-01-01)
Three electroactive terthienyl based monomers, namely 1-phenyl-2-[4-(2,2':5',2 ''-terthien-3'-ylmethoxy)phenyl]diazene (TTAz), 4-(2,2':5',2 ''-terthien-3'-ylmethoxy)-2H-chromen-2-one (TTCo) and methyl 2-[3-oxo-6-(2,2':5',2 ''-terthien-3'-ylmethoxy)-3H-xanthen-9-yl] benzoate (TTFlo), were synthesized with good yields and their conducting polymers were electrochemically prepared on ITO electrode surfaces. The effect of chromophore type on electrochemical and optical properties of the polymers was investigated...
Tuning molecular energy levels and band gap of two-dimensional benzo[1,2-b:4,5-b '] dithiophene and quinoxaline bearing polymers
Yasa, Mustafa; Goker, Seza; Udum, Yasemin; Toppare, Levent Kamil (Elsevier BV, 2019-08-15)
Two novel donor-acceptor (D-A)-type two-dimensional (2-D) polymers of PBDTSeQ (P1) and PBDTFQ (P2) were synthesized and characterized where 4,8-bis[5-(2-ethylhexyl) thiophen-2-yl] benzo[1,2-b:4,5-b'] dithiophene (BDT) was used as the donor unit. 2,3-Bis(3,4-bis(octyloxy)phenyI)-5,8-dibromoquinoxaline was used as the acceptor moiety and selenophene and furan were utilized as n bridges. Optoelectronic properties of the polymers were examined by electrochemical and spectroelectrochemical characterizations. In ...
Synthesis and polymerization of 2-and 3-substituted thiophene derivatives linked by polyether bridges
Tirkeş, Süha; Önal, Ahmet Muhtar (Elsevier BV, 2004-11-15)
New compounds consisting of 2- and 3-thienyl units linked by polyether bridges have been synthesized and their electrochemical polymerization was performed via constant potential electrolysis (CPE) in an electrolytic solution containing 0.1 M tetrabutylammonium hexafluorophosphate (TBAPF(6)) dissolved in CH3CN. 2-Thienyl monomers (I and II), but not 3-thienyl monomers (III and IV), were also polymerized via chemical oxidation, which yielded broken pi-conjugated polymer products. The polymers were characteri...
Spectroelectrochemical investigation of the anodic oxidation of dibenzo-18-crown-6
Cihaner, A; Önal, Ahmet Muhtar (Elsevier BV, 2004-10-01)
Poly(dibenzo-18-crown-6) (poly-DB18C6) was synthesized by electrochemical oxidation of dibenzo-18-crown-6 (DB18C6) using a mixture of acetonitrile and dichloromethane as the solvent and tetrabutylammonium tetrafluoroborate (TBABF(4)) or tetrabutylammonium hexafluorophosphate (TBAPF(6)) as supporting electrolyte. The anodic polymerization of DB18C6 was investigated using in situ ESR and in situ UV-Vis spectroscopic techniques. Spectroelectrochemical (SPEL), properties and thermal analysis of the resulting po...
Synthesis and characterization of optical, electrochemical and photovoltaic properties of selenophene bearing benzodithiophene based alternating polymers
Atli, Gulten Ozkul; Alemdar, Eda; Taşkaya Aslan, Sultan; Udum, Yasemin Arslan; Toppare, Levent Kamil; Çırpan, Ali (Elsevier BV, 2020-04-01)
In this study two donor-acceptor type alternating polymers containing electron-deficient benzotriazole moiety and electron-rich selenophene bearing benzodithiophene moiety; P1 and P2, were designed and synthesized via Stille polymerization. Moreover, the effects of thiophene and selenophene as pi-bridges on optical, electrochemical and optoelectronic features of polymers were examined. The optical band gap values of P1 and P2 were found as 1.47 eV and 1.72 eV, respectively. Cyclic voltammetry studies were p...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
S. Tarkuc, Y. A. Udum, and L. K. Toppare, “Molecular architecture: Another plausible pathway toward a low band gap polymer,”
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
, pp. 89–93, 2010, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/41588.